JP2017053308A - Wind power generator device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wind power generator device including an idling rotor that rotates at a high speed and generates a low-atmospheric pressure to draw a large amount of air flow from the outside and rotate with an excellent efficiency, thereby providing high-generation efficiency.SOLUTION: In the wind power generator device, a longitudinal main shaft 5 coupled to a generator 9 is provided with a rotor 10 for turning the shaft with wind force and the rotor 11 idling around the longitudinal main shaft 5 so that a lift force-type blade 14 of the idling rotor 11 generates low pressure within the rotational diameter thereof to draw a normal pressure air flow from an outside part with an atmospheric pressure difference.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a wind power generator, and more particularly to a wind power generator capable of generating power efficiently at a low wind speed even with a small windmill having a lift-type blade (hereinafter simply referred to as a blade) having a small wind receiving area.

  A wind power generator in which a rotor is arranged in two upper and lower layers on one vertical main shaft is disclosed in Patent Document 1, for example.

JP 2006-17011 A

In the invention described in Patent Document 1, long blades are used. If the blades are formed in a plurality of layers, the overall height is increased, which is not suitable for a small wind power generator.
The upper and lower rotors are fixed to the longitudinal main shaft and rotate simultaneously.
It is an object of the present invention to provide a wind power generator that can be disposed in a garden of a private house, a path in a rice field, or the like, and that can generate power efficiently at a low wind speed.

  The specific contents of the present invention are as follows.

(1) The vertical main shaft connected to the generator is provided with a rotor that rotates the vertical main shaft by wind power, and a rotor that idles around the vertical main shaft, and the low pressure generated within the rotation diameter of the lift type blade of the rotor that idles. A wind power generator characterized in that an air flow is drawn from the outside by a difference in atmospheric pressure.

  The wind power generator according to (1), wherein the idling rotor is disposed on an upper portion of a rotor that rotates a longitudinal main shaft.

  The wind power generator according to (1), wherein the idling rotor is disposed below a rotor that rotates a longitudinal main shaft.

  The idling rotor is the wind power generator according to (1), provided at an upper part and a lower part of a rotor that rotates a longitudinal main shaft.

  The wind power generator according to any one of (1) to (4), wherein a chord length of the lift type blade is in a range of 45% to 60% of a rotation radius.

  The wind power generator according to any one of (1) to (5), wherein the lift-type blade of the idle rotor has different specifications from the rotor blade that rotates the longitudinal main shaft.

  The lift type blade of the idling rotor disposed on the upper part of the rotor for rotating the vertical main shaft is disposed at the tip of the left and right support arms with the upper portion inclined in the vertical main shaft direction (1), (2) The wind power generator according to any one of (4).

  (1), (1), (3) the lift type blades of the idling rotor disposed at the lower part of the rotor for rotating the longitudinal main shaft are disposed at the tips of the left and right support arms with the upper part inclined outward. 3) A wind turbine generator according to any one of (4).

  According to the present invention, the following effects can be obtained.

In the invention described in (1), in addition to the rotor that rotates the vertical main shaft, a rotor that idles around the vertical main shaft is disposed. The rotational speed of the idling rotor is higher than the rotational speed of the rotor that rotates the longitudinal main shaft connected to.
When the lift type blades arranged in each rotor reach a speed equal to or higher than a certain rotational peripheral speed, the airflow flowing along the peripheral surface of the lift type blades passes at a high speed higher than the wind speed due to the Coanda effect. As a reaction, the lift type blade rotates at a speed higher than the wind speed.
Since the idling rotor is not associated with the generator, no cogging torque is applied, so it always rotates at a higher speed than the rotor on which the cogging torque is acting, and the airflow in the rotation trajectory where the blade rotates is at a high speed in the vertical direction. In the blade rotation trajectory, the atmospheric pressure is lower than that of the surrounding air flow, and normal air flow is drawn from the outside.
As a result, a large amount of airflow other than the flow of wind hits the blades, and the airflow from the outside hits the blades of the rotor other than the idling rotor in order to increase the lift generated in the blades. Make efficient power generation.

  In the invention described in (2) above, since the idling rotor is disposed above the rotor that rotates the longitudinal main shaft, when the idling rotor rotates at high speed, the rotation inside of the blade is negative pressure. Thus, a large amount of airflow from the outside is called in, and the rotor that rotates the longitudinal main shaft by the large amount of airflow from the outside also rotates at a higher speed than the wind speed, thereby generating efficient power generation.

  In the invention described in (3) above, since the idling rotor is disposed around the vertical main shaft below the rotor that rotates the vertical main shaft, the idling rotor rotates at a higher speed than the surrounding wind speed. The rotor that rotates the vertical main shaft at the upper part is wound and efficiently rotated by the rising airflow generated by the rotating airflow having a low atmospheric pressure inside.

  In the invention described in (4), since the idling rotor is disposed in the upper and lower portions of the rotor that rotates the longitudinal main shaft, the low pressure generated by the upper and lower idling rotors rotating at high speed causes a large amount from the outside. The air current is drawn by the difference in atmospheric pressure, and the power generation efficiency can be increased.

  Since the chord length of the lift type blade in the invention described in (5) is 45% to 60% of the rotation radius, the wind receiving area can be widened and the chord length of the idling rotor blade is further increased. If it is lengthened, over-rotation can be suppressed.

  In the invention described in (6) above, the lift-type blade of the rotor that rotates idly changes in the air pressure due to idling by changing the shape, wind receiving area, size, etc., different from the blade of the rotor that rotates the longitudinal main shaft. Can be suitable.

  In the invention described in (7) above, the lift-type blades of the idling rotor disposed on the upper part of the rotor that rotates the vertical main shaft are arranged at the tips of the left and right support arms with the upper portion inclined in the vertical main shaft direction. Therefore, the tornado-shaped updraft generated by the idling and the accompanying downward airflow can be efficiently raised.

  In the invention described in (8) above, the lift type blades of the idling rotor disposed at the lower part of the rotor for rotating the vertical main shaft are arranged at the tips of the left and right support arms with the upper part inclined outward. Therefore, the tornado-like airflow generated by the idling and the airflow moving downward along therewith can be efficiently eliminated.

It is a front view showing one embodiment of the present invention. It is a top view of the wind power generator shown in FIG. FIG. 2 is an inner side view of the blade in FIG. 1. FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3. It is a front view which shows Example 2 of the wind power generator of this invention. It is a front view which shows Example 3 of the wind power generator of this invention. It is an inner side view of a blade showing one embodiment of an idling rotor. FIG. 6 is a plan view of the blade in FIG. 5. FIG. 6 is a front view of the blade in FIG. 5.

  The present invention will be described below with reference to the drawings.

  In FIG. 1, a wind turbine generator 1 according to the present invention includes a support base 3 provided inside a support frame 2 constructed on a base G, and a vertical main shaft via a cylindrical lower bearing 4 fixed thereon. 5 is erected. The upper end portion of the vertical main shaft is supported by an upper bearing 8 that is fixed to the upper portion of the support frame body 2 and disposed at the center portion of the horizontal frame body 7.

  The support frame 2 is framed by a plurality of (four in FIG. 2) support columns 6 and a plurality of horizontal frames 7 that are erected on the base G. The upper horizontal frame 7 has an upper bearing 8 fixed to the center of a middle cross 7B arranged in a cross shape inside a rectangular outer frame 7A.

  The lower bearing 4 has a longitudinal main shaft 5 supported therein via bearings 4A and 4B. A flange 4C is formed at the upper end of the lower bearing 4, and a coil member of the generator 9 is formed on the upper surface thereof. 9A is fixed.

A magnet member 9B in the generator 9 is fixed to the vertical main shaft 5 at an upper portion of the coil member 9A through which the vertical main shaft 5 passes through the center portion.
As the longitudinal main shaft 5 rotates, the magnet member 9B rotates, and magnetic flux is connected to and disconnected from the coil member 9A, and induction power generation is performed in the coil member 9A.

  In the vertical main shaft 5, a rotor 10 that rotates the vertical main shaft in the lower portion and a rotor 11 that idles in the upper portion are disposed in two layers, upper and lower. The chord length of the lift type blades 12 and 14 in each rotor 1011 is 45 to 50% of the turning radius. If the chord length is narrower than this, the wind receiving area will be reduced and the airflow will not be fully utilized. If it is wider than this, it becomes resistance during rotation.

  The base end portions of the left and right support arms 10A of the lower rotor 10 are fixed to a fixing member 10B fixed to the vertical main shaft 5, and vertical blades 12 and 12 have wide inner side surfaces 12B at the respective tip portions. It is mounted so as to face the vertical main shaft 5. The upper and lower end portions of each blade 12 are inclined portions 12A that are inclined in the direction of the longitudinal main shaft 5.

The base end portion of the support arm 11A in the upper rotor 11 is fixed symmetrically to a rotating body 13 rotatably attached to the vertical main shaft 5, and vertical blades 14 and 14 are respectively attached to the tip portions thereof. The wide inner surface 14B is fixed to the vertical main shaft 5 so as to face it.
The upper and lower ends of each blade 14 are inclined portions 14A that are inclined in the direction of the longitudinal main shaft 5.

As shown in FIG. 4, the cross section of each blade 12 has a substantially fish shape, and the inner side surface 12B bulges out thickly, while the outer side surface 12C is substantially linear in the front-rear direction.
The rear edge 12E is slightly inclined with respect to the support arm 8A. When the wind is received by the inner side surface 12B during rotation, the rear edge 12E rotates in the direction of the front edge 10D.

  The height of the blade 10 is about 1.5 times the turning radius, and the chord length is about 45% to 50% of the turning radius. The maximum thickness of the blade 12 is 20 to 30% of the chord length, but is set according to the installation environment, and each numerical value described here is not limited.

  When the lower rotor 10 receives the airflow from the blade 12, the rotor 10 rotates, and the vertical main shaft 5 and the magnet member 9B of the generator connected thereto are rotated to generate electric power. When the blade 14 of the upper rotor 11 receives the airflow, it rotates idly around the longitudinal main shaft 5.

  This idling rotation rotates at a higher speed than the lower rotor 10 that rotates the longitudinal main shaft 5, and lift is generated by a high-speed airflow that passes through the Coanda effect generated in the chord direction of the blade 14, and rotates at a speed higher than the wind speed. .

On the side surface of the blade 14 that rotates at high speed, there is an airflow that rotates together with the blade 14 due to the viscosity of the fluid, and with high speed rotation, the density of the fluid becomes coarse and the atmospheric pressure decreases.
The airflow within the rotating diameter is drawn in the centrifugal direction by this low pressure airflow and escapes in the vertical direction while swirling along the inner surface of the blade 14. Then, due to the difference in atmospheric pressure from the surroundings, the atmospheric airflow is attracted and hits the blade 14 to accelerate the rotation.

  Therefore, when the idling rotor 11 rotates at a high speed above the lower rotor 10, the tornado-like air current rising from the lower rotor 10 acts to lift the low-pressure ascending air generated in the idling rotor 11, The pressure within the rotating diameter of the lower rotor 10 is further reduced, and a large amount of atmospheric airflow from the outside is sucked to increase the rotation efficiency together with the power generation efficiency.

  The lengths of the support arms 10A and 11A of the upper and lower rotors 10 and 11 are the same in FIG. The blades 12 and 14 are also in the same form, but the specifications can be different depending on the installation location.

  In FIG. 2, the rotation direction (counterclockwise) of the blades 14 of the rotor 11 that idles and the rotation direction (clockwise rotation) of the blades 12 of the lower rotor 10 are opposite to each other. The rotation direction of each may be the same.

FIG. 5 is a front view showing Example 2 of the wind turbine generator 1. The same members as those of the previous example are denoted by the same reference numerals and description thereof is omitted.
In this embodiment, another idling rotor 15 is disposed below the rotor 10 that rotates the longitudinal main shaft 5 of the wind turbine generator 1 shown in FIG.

  The specifications of the idling rotor 15 are the same as those of the idling rotor 11 shown in FIG. 1. However, for example, the specifications of the blade 16 of the lower rotor 15 are determined from the blade 14 of the upper rotor 11. It can be changed arbitrarily such as large or small.

FIG. 6 is an embodiment in which the mounting angle of the blades 14 and 16 of the rotor 11 and the idle rotor 15 to the support arms 11A and 15A of the wind power generator 1 shown in FIG. 5 is changed.
In other words, the blade 14 of the rotor 11 that idles has an upper portion inclined in the direction of the longitudinal main shaft 5. Further, the blade 16 of the lower rotor 15 has an upper portion inclined outward.

  When rotating, the blade 14 of the rotor 11 that idles in the upper portion has a lower rotational peripheral speed than the upper portion, and for comparison, a lower pressure airflow is generated in the lower portion than in the upper portion of the blade 14. Since the low-pressure airflow is light and easy to rise, the upward airflow is generated quickly, and the upward airflow below is sucked.

  When the blade 16 in the lower rotor 15 rotates, the rotational peripheral speed of the upper portion is faster than the lower portion of the blade 16, a low-pressure airflow is generated, and an airflow due to a difference in atmospheric pressure is generated from the lower portion, thereby rotating the longitudinal main shaft 5. The updraft generated by 10 is pushed up and lifted, and a large amount of atmospheric pressure airflow from the outside is drawn in to increase rotational efficiency and power generation efficiency.

FIG. 7 is an inner side view (left side surface) of a rotating blade of an example used as a blade of an idle rotor, FIG. 8 is a plan view thereof, and FIG. 9 is a front view thereof.
The blade 17 is characterized by an inner surface 17C shown in FIG.

  That is, the blades in a general vertical wind turbine are vertically long. On the other hand, the blade 17 is characterized in that the chord length is longer than the height. The chord length can be about 50-60% of the radius of rotation. If it exceeds 60%, the resistance during rotation increases. If it is less than 50%, it does not meet the purpose of over-rotation suppression.

  In the plan view shown in FIG. 8, the outer side surface 17F is substantially straight in the front-rear direction, but the inner side surface 17C is formed so that the front edge 17D is thick and thin toward the rear edge 17E. Yes.

  As a result, the relative flow that hits the leading edge 17D during rotation passes through the inner surface 17C in the direction of the trailing edge 17E at a high speed due to the Coanda effect, and the reaction strongly pushes the blade 17 in the rotating direction. That is not negative.

  Furthermore, the rotors 11 and 15 that run idle rotate at a high speed because no cogging torque is applied.However, since the chord length is long, a resistance is generated when a certain speed is reached. Destruction is suppressed.

  According to the present invention, even in land where the wind condition is not excellent, it is effectively used as a wind power generator that can generate power by drawing in air current from the outside due to low pressure generated by rotation of a rotor that idles by low-speed wind. can do.

1. Wind power generator 2. 2. Support frame 3. 3. Support stand Lower bearing 4A, 4B. Bearing 4C. Flange 5. Longitudinal spindle 6. Post 7. Horizontal frame 8. 8. Upper bearing Generator 9A. Coil member 9B. Magnet member
Ten. Rotor that rotates the vertical spindle
10A. Support arm
11． Idling rotor
11A. Support arm
12． Lift type blade
12A. Slope
12B. Inner surface
12C. Outside
12D. Leading edge
12E. Trailing edge
13. Rotating body
14. blade
14A. Slope
14B. Inner surface
15． Idling rotor
15A. Support arm
16． blade
16A. Inclined part
16B. Inner surface
17. Blade that idles
17A, 17B. Slope
17C. Inner surface
17D. Leading edge
17E. Trailing edge
17F. Outside

Claims (8)

  A vertical main shaft connected to the generator is provided with a rotor that rotates the vertical main shaft by wind power, and a rotor that idles around the vertical main shaft. A wind turbine generator that draws in airflow due to a difference in atmospheric pressure.   The wind turbine generator according to claim 1, wherein the idling rotor is disposed on an upper portion of a rotor that rotates a longitudinal main shaft.   The wind power generator according to claim 1, wherein the idling rotor is disposed at a lower portion of the rotor that rotates the longitudinal main shaft.   The wind power generator according to claim 1, wherein the idling rotor is provided at an upper portion and a lower portion of the rotor that rotates the longitudinal main shaft.   5. The wind power generator according to claim 1, wherein a chord length of the lift type blade is in a range of 45% to 60% of a rotation radius.   The wind power generator according to any one of claims 1 to 5, wherein the lift type blade of the idling rotor has different specifications from the rotor blade that rotates the longitudinal main shaft.   The lift type blade of the idle rotor disposed on the upper part of the rotor for rotating the longitudinal main shaft is disposed at the front ends of the left and right support arms with the upper end inclined in the longitudinal main shaft direction. The wind power generator according to any one of claims 1, 2, and 4.   The lift type blades of the idle rotor disposed at the lower portion of the rotor for rotating the longitudinal main shaft are disposed at the tips of the left and right support arms with the upper ends inclined outwardly. The wind power generator according to any one of claims 1, 3, and 4.

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